Maybe more VAT bands? 0% on essential food, as now. 20% on chocolate. 50% on golf clubs.
It would be interesting to tax cars on value above a basic one with broadly similar function. A Kia Picanto is apparently 11.5k while an Audi A1 is 18.5k for basically the same features (4 doors, not much boot space, has an engine and some wheels) so that extra 7k is pure luxury and should be taxed at 40%? Probably impossible to codify.